South Dakota

Top Three Infrastructure Concerns:

  1. Roads
  2. Wastewater
  3. Drinking Water

Key Infrastructure Facts

  • 25% of South Dakota’s bridges are structurally deficient or functionally obsolete.
  • There are 47 high hazard dams in South Dakota. A high hazard dam is defined as a dam whose failure would cause a loss of life and significant property damage.
  • 67 of South Dakota’s 2,349 dams are in need of rehabilitation to meet applicable state dam safety standards.
  • 34% of high hazard dams in South Dakota have no emergency action plan (EAP). An EAP is a predetermined plan of action to be taken including roles, responsibilities and procedures for surveillance, notification and evacuation to reduce the potential for loss of life and property damage in an area affected by a failure or mis-operation of a dam.
  • South Dakota’s drinking water infrastructure needs an investment of $990 million over the next 20 years.
  • South Dakota ranked 50th in the quantity of hazardous waste produced and 49th in the total number of hazardous waste producers.
  • South Dakota reported an unmet need of $7.2 million for its state public outdoor recreation facilities and parkland acquisition.
  • 29% of South Dakota’s major roads are rated in poor or mediocre condition.
  • Vehicle travel on South Dakota’s highways increased 29% from 1990 to 2007.
  • South Dakota’s transportation system has $756 million in deferred-maintenance and construction needs.
  • South Dakota has $67 million in wastewater infrastructure needs.


*Survey of the state’s ASCE members conducted in September 2008

Deficient Bridge Report, Federal Highway Administration, 2008.
National Inventory of Dams, U.S. Army Corps of Engineers, 2008.
Drinking Water Needs Survey and Assessment, Environmental Protection Agency, 2003.
National Biennial RCRA Hazardous Waste Report, Environmental Protection Agency, 2007.
2007 Annual Report, Land and Water Conservation Fund State Assistance Program, National Park Service.
TRIP Fact Sheet, March 2009.
Grading the States ’08: A Management Report Card, Government Performance Project, Governing Magazine.
Clean Water Needs Survey, Environmental Protection Agency, 2004.